The 2018 BMW X4 is a compact luxury SUV with a sloping rear roofline, much like the larger but equally sleek BMW X6. It is available in two trim levels: the xDrive28i and M40i. Standard xDrive28i features include 19-inch alloy wheels, automatic adaptive xenon headlights, LED foglights, rain-sensing wipers, a sunroof, heated and power-folding exterior mirrors, auto-dimming mirrors, a power liftgate, front and rear parking sensors, selectable drive modes and cruise control. On the inside, the features list continues with dual-zone automatic climate control, eight-way power front seats with driver memory functions, a tilt-and-telescoping steering wheel, simulated leather upholstery, 40/20/40-split folding rear seats, a universal garage door opener, BMW Assist emergency telematics, BMW's iDrive infotainment system, a rearview camera, Bluetooth phone and streaming audio, and a nine-speaker CD player with HD radio and USB-auxiliary input. Stepping up to the X4 M40i will add an adaptive suspension, keyless entry and ignition, and a premium Harman Kardon audio system with satellite radio. It also comes with the M Sport package that includes unique aerodynamic exterior touches, black exterior trim, a sport-tuned suspension, an increased top speed, sport seats and a sport steering wheel. Bundled options include the Cold Weather package (heated front and rear seats, a heated steering wheel and headlight washers); the Driving Assistance package (forward collision warning and mitigation, lane departure warning, blind-spot monitoring, a head-up display and a speed limit display); and the Parking Assistance package (a surround-view camera system and an automated parking system). The M40i is also eligible for the Lighting package (adaptive LED headlights and automatic high beams). Other add-ons include a navigation system, a wireless charging pad, a Wi-Fi hotspot and Apple CarPlay.